A thermally conductive silicone gel for EV battery gap filling must transfer heat across irregular spaces while applying low stress to cells, modules, busbars and cooling plates. It must also meter, mix, dispense and cure fast enough for the line. Thermal conductivity alone cannot establish pack performance because gap thickness, voids, contact, coolant design, cure and aging control the real heat path.
JY9152-08N Two-Component Thermally Conductive Silicone Gel is Juyou’s current A/B gap-filling route. Buyers should request the current controlled ratio, rheology, cure, thermal, mechanical and electrical documents. This guide turns battery geometry and line requirements into a sample, module, reliability and supply qualification.
Map the battery gap and heat path
Provide cell format, module layout, cooling plate, housing, dielectric coating and every surface contacting the gel. Measure nominal, minimum and maximum gap, flatness, roughness and tolerance by location. Identify heat sources, coolant channels, fast-charge profile, ambient range and allowed cell-temperature spread.
Calculate fill volume with manufacturing tolerance, not CAD nominal alone. Determine whether the gel must bridge vertical surfaces, flow beneath cells, avoid vent paths or accommodate service access. A material with high flow can fill fine irregularities but may leak from an open joint; a thixotropic grade can hold shape but require more dispense pressure.
- Cell and module architecture
- Gap distribution and tolerance
- Cooling-plate interface
- Thermal duty and temperature spread
- Containment and keep-out zones
Turn properties into assembly requirements
Specify thermal conductivity with method, density, A/B ratio, component and mixed viscosity, working time, cure schedule, hardness or modulus, adhesion, dielectric evidence, bleed, volatility and service-temperature context. Separate supplier typical values from guaranteed release fields and from pack-level acceptance.
Stress matters as much as heat transfer. The cured gel must conform through thermal expansion and vibration without imposing unacceptable cell or weld load. Define compression, modulus and adhesion targets from mechanical analysis. If rework is required, decide whether cohesive removal, peel or cut access is acceptable.
- Thermal method and target
- Mix ratio and rheology
- Work time and cure
- Modulus and stress relief
- Adhesion and rework
Qualify meter-mix and dispensing
Use production-representative pumps, follower plates, hoses, mixer and nozzle. Record component temperature, ratio accuracy, pressure, flow rate, shot mass, bead geometry, mixer residence time and pause/restart. Filled materials can settle or abrade equipment, so follow controlled conditioning instructions and monitor ratio at the nozzle.
Dispense into transparent fixtures and sacrificial modules to locate voids, knit lines and shadowed areas. Compare path, nozzle height and speed. Confirm vertical hold or leveling before cure. Establish purge limits, mixer change interval, refill procedure and line-cleaning controls.
- Component conditioning
- Ratio and pressure monitoring
- Shot mass and bead path
- Void inspection
- Pause, purge and mixer life
Control cure and production takt
Measure working time from first mixing, not from the end of dispensing. Track gel point, handling strength and full cure at line and cold-start temperatures. If heat acceleration is considered, confirm that the cells, electronics, coatings and adhesives tolerate the profile and that flow and bubble release are complete first.
Build a cure-verification method for production, such as witness coupons, hardness trend or another validated check. Define maximum open time before assembly and minimum time before movement or test. A fast brochure cure does not guarantee the thickest, coldest part of a pack is ready.
- Working and open time
- Room and accelerated cure
- Thick-section verification
- Handling gate
- Production takt and buffer
Verify thermal performance at module and pack level
Build matched modules with candidate, current material and justified control. Hold cell lot, gap, dispense, cooling, power and sensors constant. Measure cell and plate temperatures during charge, fast charge, discharge, soak and cooldown. Inspect whether voids or uneven thickness correlate with hot spots.
Repeat after environmental and durability aging. Model data are useful for screening, but pack approval needs physical assemblies. Define maximum temperature, spread, thermal resistance and repeatability before testing. Include fault or reduced-coolant conditions only under the buyer’s safety-controlled plan.
- Matched module build
- Charge and discharge profiles
- Temperature and spread
- Void and thickness correlation
- Post-aging pack test
Test electrical, mechanical and aging behavior
Confirm dielectric strength, insulation resistance, volume resistivity or other required evidence with defined methods and thickness. Inspect compatibility with dielectric coatings, busbar insulation, plastics, adhesives and coolants. The gel does not replace pack creepage, clearance, isolation monitoring or safety design.
Run required thermal cycling, vibration, mechanical shock, damp heat, coolant exposure and storage. Inspect cracks, delamination, bleed, pump-out, hardness change, corrosion, electrical drift and cell stress. Set failure limits and root-cause ownership before the program starts.
- Electrical insulation evidence
- Contact-material compatibility
- Thermal cycling and vibration
- Humidity and coolant exposure
- Failure limits and analysis
Control packaging and high-volume supply
Match A/B package size to consumption ratio, equipment connection and opened-container life. Confirm lot pairing, net mass, labels, closure, storage, transport temperature and pallet. Define how separated, overheated, frozen, leaking or mismatched components are quarantined and evaluated.
Incoming control can include identity, appearance, COA review, ratio check and a short cure or dispense test. Track yield, purge, mixer waste, cure energy, cycle time, rejected modules, freight and inventory to calculate cost per accepted pack. Require change notification and confirm repeat lots before sole-source approval.
- A/B package and lot pairing
- Equipment connection
- Incoming cure/dispense check
- Cost per accepted pack
- Change and continuity control
Send a complete JY9152-08N RFQ
Use the Juyou inquiry form to send cell and module type, gap map, fill volume, cooling plate, power and charge profile, temperature target, substrates, meter-mix equipment, shot rate, cure window, modulus, dielectric, adhesion, rework and reliability needs, sample quantity, annual demand, package and destination.
Request matched JY9152-08N A/B samples, current TDS/SDS, sample COA, controlled ratio and handling guidance, thermal/electrical context, package, MOQ, lead time and quote. Use the Thermal Management Material Series to frame separately qualified pads, greases or potting alternatives.
- Gap and thermal profile
- Meter-mix and takt
- Mechanical/electrical targets
- Reliability and rework
- Volume, package and documents
Request a JY9152-08N EV Battery Trial
Send the battery gap map, cooling design, dispense rate, cure window, modulus, dielectric, reliability, sample and annual volume needs for a matched A/B trial.
Frequently Asked Questions
What should a JY9152-08N RFQ include?
Include cell and module type, gap map, fill volume, cooling plate, power profile, temperatures, substrates, equipment, takt, cure, modulus, electrical, reliability, volume and destination.
Is thermal conductivity enough to select a gap filler?
No. Gap thickness, voids, contact, flow, cure, modulus, dielectric behavior, aging and cooling design determine pack performance.
Why use production meter-mix equipment in trials?
Ratio accuracy, pressure, mixer residence, pause/restart and bead path can change cure, voids and line consistency.
Can heat shorten cure time?
Potentially, but only after verifying the current supplier guidance, component temperature limits, flow completion and cure through the thickest cold area.
How should rework be qualified?
Define access, removal method, residue, substrate damage and replacement process, then test electrical and thermal performance after the approved repair.